Networking and Communication Engineering

Dilip Thomas ¹, K. S. M. Panicker ²

Affiliations
1 Electronics and communication Department, Dr.M.G.R. University, Chennai, Tamil Nadu, IN
2 Federal Institute of Science and Technology, Ernakulam, Kerala, IN

Abstract

The recovery of intentional/ unintentional modification of data is conventionally done by creating a backup/copy of data prior to its modification. Alternately, In this paper, the data recovery process is performed by contextually switching the semaphores to control the system resources. The designed hardware is placed in the PCI slot between the CPU and lower-level peripherals. A binary semaphore controls the data flow between the designed hardware and the CPU, whereas a mutually exclusive (context-switching) semaphore controls the data flow between the designed hardware and lower-level peripherals. The semaphore management mechanisms are moved from the application to the physical and data-link communication layers. A fully distributed management scheme is implemented, and there is no need to place the semaphore control structures on a particular node in the network. The existing version of the selected data file is copied and directed to a non-readable area of the secondary storage. This ensures retrieval of the former contents of the data file via Linked Link concept if the current modification is not authenticated.

Keywords

ASIC Chip, Context Switching, Operating System, Peripheral Component Interconnect, SRAM.

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Dilip Thomas ¹, K. S. M. Panicker ²

Affiliations
1 Electronics and Communication Department, Dr. M.G.R. University, Chennai, Tamil Nadu, IN
2 Federal Institute of Science and Technology, Ernakulum, Kerala, IN

Abstract

The technologies of computer security are more logic oriented. Designing a program with security often imposes restrictions on that program's behavior. In this work, it is proposed to add a security level in hardware such that the security will extend from the computer architectural hardware level to the software OS level. Even though the operating system controls access to the system resources and programs, the request for the access to these system resources through the Operating System (OS) is done via an integrated chip located in the Peripheral Component Interconnect (PCI) bus of the system. This will add a new dimension of security to the entire computer architecture. The level of security appropriate for a particular system depends on the value of the resources being secured. Incorporation of key operating system function into the hardware is planned so that the size of the security mechanisms still remains small, while not back tracking on the implementation of security. Use of various monitoring functions performed at regular intervals incorporated into the hardware is done so that its implementation is much faster than its equivalent software implementation.

Keywords

Computer Architecture, Operating System, PCI, System Security.

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